[Coco] [COCO] SuperIDE SuperDrivers and DVDROM IDE drives

[Mark Marlette]

Gene,

Chris would know more about the specifics but as I understand it. To access a CDROM/DVD on the CoCo3, it requires, SuperDriver, Chis's CDman(?? forgot name ATM) and at later version of NOS. They all work together.

Chris????

Regards,

Mark






________________________________
 From: Gene Heskett <gheskett at wdtv.com>
To: coco at maltedmedia.com 
Sent: Friday, September 21, 2012 6:55 AM
Subject: Re: [Coco] [COCO] SuperIDE SuperDrivers and DVDROM IDE drives
 
On Friday 21 September 2012 07:16:02 David Ladd did opine:

> Just a quick check to see if anyone has managed to use a IDE DVDROM
> drive on the CoCo using the SuperIDE and the SuperDrivers?

I don't know about that combination as my setup is scsi, but I believe that 
the drivers from Chris Hawks are required because the native sector sizes 
of the CD/DVDROM is 2048 bytes.  I believe the superdriver only translates 
between 512 byte sectors and the coco's native 256 byte sectors.  It does 
this nicely on both of the 1gb scsi drives I have hooked up.

That is something I should check into as I do have a scsi cd reader.
Humm, according to Cloud9's site, it does appear that the superdriver 
should support a cdrom's 2048 bit sector.  But with only the usual 24 bit 
addressing, a DVDROM would overflow if it was more than 90% full.  4Gb max 
drive size.  That, with the size of our corpus of os9 software, shouldn't 
be a problem. :(

There is one gotcha in the superdriver, but I'd have to go boot up mine to 
get the details.  The docs aren't too clear in places.

Cheers, Gene
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